??Nitrile rubber o-rings process description

??Nitrile rubber o-rings in butadiene and acrylonitrile by copolymer was prepared by emulsion polymerization. Production process consists of water and hydrocarbon phase, polymerization, degassing and monomer recovery, condensation drying and packing process.

??Is the main process to butadiene, acrylonitrile, according to the proportion of two kinds of monomer hydrocarbon phase will start powder, sodium hydroxide, sodium pyrophosphate, triethanolamine, such as preparation for the water phase, and prepare regulator and exciting agent solution. In the polymerization kettle, in turn, the measurement of the water phase, hydrocarbon phase, conditioners and excitation agent into the solution, and then mixing temperature, in 30 ~ 50 ? temperature under the conditions of polymerization reaction.

??When 65 ~ 70% of total monomer conversion, start cooling discharge, at the same time adding the termination agent solvent polymerization of mucilage. Mucilage in the degassing tower through reduced pressure distillation, the unreacted acrylonitrile butadiene, steamed out of recovery. After the removal of monomer mucilage, condensed in sodium chloride solution, in the long nets machine into belt, then through washing, vacuum box and press roller dehydration, drying oven drying after packaging for finished products.

??This device and acrylonitrile butadiene production materials for level 1 flammable liquid and toxic substances, including acrylonitrile to ? poison.